Vertical tapping-machine.



N0. 871,U69. v v PATENTED NOV. 12. 1907.

' R. SGHOLZ.

VERTICAL TAPPING MACHIN E.

APPLIOATION FILED JUNE 12. 1906.

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WHTHESSES INVENTOR MM I #49,. T? w No. 871,069. PATENTED NOV. 12, 1907 R. SOHOLZ.

VERTIQALTAPPING MACEINE. APPLIOATION FILED JUNE 12. 1906.

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INVENTOR 'PATENTED NOV. 12, 1907 R. scaoLz. VERTICAL TAPPING MACHINE PPPPPPPPPPPPPP 311mm: 12. me.

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NNNNNN OR 50 springs 18 tending to hold the pins in engagement with UNITED STATES PATENT RICHARD SGHOLZ, OF LORAIN, OHIO, ASSIGNOR To THE NLiTIOXAL Toss COMPANY, OF PITTSBURG, PENNSYLVANIA, a CORPORATION or new JERSEY.

VERTICAL TAPPING-MACHIN'E.

Specification of Letters Patent.

Patented Nov. 12, 1907.

Application filed June 12,1906. Serial No. 321.363,

To all whom it may concern:

Be it known that I, RICHARD Senonz, of Lorain, Lorain county, Ohio, have invented a new and useful Vertical Tapping-Machine, of which the following is a full, clear, and exact description. reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a side elevation, partly in section of a. tapping machine embodying my invention the couplt) ling gripping 1nechanisin "'bein'g omitted; Fig. 2 is a front elevation also showing certain parts in section; Fig. 3 is a plan view showing the tap catcher and coupling stop; Fig. 4 is a detail view of the safety device; Fig. 5 is a section on the line V-V of Fig. 2; and Fig.

6 is a sectional elevation showing the tap'grip.

My invention has relation to a tapping machine designed for forming threads in pipe couplings and the like, and is designed to provide an efficiently practical machine of this character which will insure the formation of a thread of true'pitch, means being provided for preventing the weight of the tap from shaving or shearing the threads. The invention is also designed to reduce the time and labor required to handle the tops and thereby increase the output. I

with these objects in view, my invcntion consists in the novel construction. arrangement and combination of parts ll substantially as hereinafter described and pointed out in the appended claims.

In the accompanying dra\\'ings, the numeral 2 lcsignotes the frame of the machine, 3 the vertically movable tap spindle having the driving gear wheel 4. 5 the main driving shaft or spindle having the clongatcd pinion 6 engaged by the gear wheel 4, the shaft or spindle 5 being driven in any suitable manner, as by the beveled gear wheel 7. 8 designates-the tap and 9 a cap for the tap to rest-on, said cap having a rotary conc bearing at 10 on the upper end of avcrtically movable stem 11, which is guided by bracket 12 dep nding from the bcdor table 2 of the machine frame, At the lower end of the stem is an adjustable collar lit for thc pnrposeof limiting the stroke of the stem. said collar having arms 14, to which are connected the counter weights 15. The shank portion 8 oi the tap is squared and is connected to the spindle 3, by means of the flange coupling 16 having a socket therein which lits over the squared portion of the tap shank as shown in Figs. 5 and 6. The flange coupling it; is provided with oppositely arranged latch pins 17. which are engaged by holes 19 drilled in the squared faces of the shank. The inner ends oi these pins are beveled as shown at 20 so as to permit the tap to push them back until the holes 19 are in registering position. The projecting stems of the latch pins are provided with operating handles 21, having shoulder portions 17 which normally enter the recesses-provided in the flange coupling when the ends of the pins are in the holes 19 in the shank portion 8" of the tap. By retracting these pins and giving them a quarter turn, as shown at the left of Figs. 5 and 6, the shoulder portions 17 engage with the sides of the openings and hold the pins 17 so as to be out of the holes 19, located in the shank 8" of the tap.

The spindle 3 is provided with the lead screw 22, and a split nut 23 is provided to act as a feed for the tap.

The opposite ends of each of the two parts of the split nut 23 are provided with projecting pins 24. these pins engaging with the eccentrically formed slots 25 l0- cated in the pivoted disks or plates 26 arranged at opposite sides of the nut. The plates .26 are arranged to be partially rotated on their pivots 26 by the lovers 27 actuated by a handle 28, these levers being secured to the plates 26 by thepins or bolts :27. The upper end oi the lever 27 is connected to the counterweight lever 29, on which the counterweight 29 is adjustably secured, the opposite end of the counterweight lever 29 being supported from the frame of the machine by the link 29. With the handle 28 in the position shown in Figs. 1 and 2 the pins 24 have been actuaged by means of the slots 25 in the plates 26 to close the two parts of the split nut 23 upon the lead screw 22 and the nut is held in its closed position by engagement of the stop 26" with the latch 35 carried by the rocker shaft 36. The counterweight 29 acts to open and hold the split nut 23 so as to be disengaged iron) the lead screw 22 when the main spindle is moved up and down by means of the hand lever 30. This lever 30 is connected to the le er Ill which engages the upper end of the spindle 3, and is provided with the counterweight 3'2;

33 and 34 are compensating link connections for stcadying the movement of the lever 31 and weight 32. The nut 23 is secured in cngagcd'position with the lead screw by means of the latch 35 carried by a rocker shaft 30. Sccurcd to the shaft do is an arm 37 having a roller 38 at its upper end which is located below and in the path oi movement oi the driving gear whccl l. When the top has tinishcd cutting. the under side of the gear wheel i contacts with the roller 35. thereby moving the arm 37, the l'\|(l'(lr shalt 2H3. and discngages the latch 35. This inunodiatcly opens the split not and relieves the main spindle. which is iuuncdiatoly drawn up by the countcrwcight 32. The latch 35 can also be disengaged at any time by means of the lcvcr Ill).

it) designates any suitablc or usual coupling gripping device or jaw or gripping the coupling which is to be tapped. This 'is not shown and described in detail, as it forms no part of my invention.

41 is a rocker shalt to which are secured arms 12, which form a seat for the coupling X to rest on before being gripped. These arms are secured to the shaft 41 1 1O in the frame, to hold the arms 42 in the position shown 433ml the hole 44 in the side of the lrtune.

The coupling is plnc d The operation is as lollov/ in positiom as shown in l; l and 2: the 'nut; 23 is closed upon the lead screw 22, and the Coupling is tapped, the stem 11 moving downw llyogainst the action of the countenveights l5, and the cap 9 rotating freely on the stem. idles 721 are moved to Withdraw the latch pins iron, omonl; with the t shank, while the top in i so that after the to has ceased cutting, the tap spindle may be raise permitting the shank to drop out the conplin flange 16. A slight pressure on the stern if! from i-ll. bottom will raise the tap to its upper position.

The mainspindle 3 is then again lowered to batch the top, which is easily done, it stays in the center line 01' the main spindle at all times, After the tap has been thus bought, it is held suspended at its QXJQIUO raised position to permit the insertion of u now coupling into the grips.

By the split-nut arrangement shown and described,

" I avoid the necessity for reversing the movomen oi the rent The shaft 41 provided it?) and down through the grip blocks. The nanuail labor is greatly reduced as compared iods, thereby enabling a large increase in i oi the machine.

strueticm, and arrangement of the parts, without departing from the spirit and scope of my invention,

soar vorticnlly movable with said spinsucured to and rotated by the spindle, a split: fer-(i nut for the surewfmechanism for olnmplng the st-vtionnl not on said. sm'ow and means in the vertical with of movement of suit! drlvin; gear nnd connected to the nut clumping nioelluuium and :xrrimgod to be operated by the gear for actuating the clamping moulmuism to release the spindle; subv :intiully as described.

in :1 tri ping maeliine'the combination of a spindle adapted for marrying; :1 l: n. a driving gem- WllQQl movable with the spindle, l detutrluible food mechanism for the spir'llt. with :1 hip, mound supporting the underside of tle tap and lllI'lllS for holding said support in (*ontnct with tho tarp; tnntinll us do. ibed.

.l. In hoping lnnuliine, flit: combination of A vertically nmiuble uli ndnntotl toi' cm'ryim; :1 tap. a driving gear \Vlltvl movable with the spindle, with u run, :1 rotatable support oil \vlzltsb suld run is inountwl \vliile tapping the wmplirn. and ylolding: means (:onnutlml with and carrying the support: substantially as do 'ibod.

4. In n tapping mnvliino. a LOtfli slintt having: coupling sunportlng :ll'lllH, mm s for moving the shaft into its onorntiw po-ution and posltlvo. means for holding said shaft in Mich position: substantially us doserlbod.

71. in n tapping machine, u ynl'tlt'ally movable tun. :1 mm For the tun to rest on, n vertli-nlly movable stem currying" the (run and (rout!torwoights for mild ,stnm; subsmlr iinll ns dose: ri.

ti. in u topping machine, it vortlvzuly movable tap, a my: llu 1: in rest. on, :1 vnrtiuully movable stein on vc'nvb tinmq: s; rotntobl mounted, ninuns for limiting the Xlluv' llltlli, of the em :md' muuterwnigbts for tho stern :tntl run: substn. 4.115 :m described.

in It: my whereof. I have hereunto set my lumd.

lllCllAltl) SCHOLZ. 

